If you haven't hidden them from your Facebook newsfeed, you're probably familiar with couples who use the social networking site as a platform to gush about their love. Wonder what the real reason is behind their mushy posts? According to a new study by Albright College, people who brag about their relationships on Facebook are both happy -- and nervous -- about them. Researchers found that people who are happy in their unions are more likely to post pictures and statuses about them, as well as "like" comments on their partner's wall. However, they also behave this way "partially to reassure other people and themselves."